“…In 2001, Riedl et al [22] first reported a significant reduction of residual tumor rate in 102 patients, finding remnant tumor at second-look TURB in 16% and 39% of PDD and WL cases, respectively (P = 0.005). One year later, Kriegmair et al [23] found PDD to significantly decrease residual tumors in 129 patients, as 62% and 41% were resected tumor-free at primary resection by PDD and WL, respectively (P < 0.014). Filbeck et al [24] confirmed these findings in the largest study on residual tumors to date, with a residual tumor rate of 4.5% and 25.2% in PDD versus WL, respectively (P < 0.0001), in 191 patients.…”